1666214804 has 24 divisors (see below), whose sum is σ = 3074534400. Its totient is φ = 787924800.

The previous prime is 1666214779. The next prime is 1666214831. The reversal of 1666214804 is 4084126661.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27437 + ... + 63915.

It is an arithmetic number, because the mean of its divisors is an integer number (128105600).

Almost surely, 2^1666214804 is an apocalyptic number.

It is an amenable number.

1666214804 is a deficient number, since it is larger than the sum of its proper divisors (1408319596).

1666214804 is a wasteful number, since it uses less digits than its factorization.

1666214804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37103 (or 37101 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 1666214804 is about 40819.2945063973. The cubic root of 1666214804 is about 1185.5239433257.

The spelling of 1666214804 in words is "one billion, six hundred sixty-six million, two hundred fourteen thousand, eight hundred four".